Leading vs Number one

When to use each in English, with meaning, register, and examples.

Leading

Top 2,000 (common)B1adjective

Number one

Top 2,000 (common)
 LeadingNumber one
Pronunciation🇬🇧 /["/ˈliːdɪŋ/"]/🇺🇸 /["/ˈliːdɪŋ/"]/🇬🇧 //ˈnʌmbər wʌn//🇺🇸 //ˈnʌmbər wən//
MeaningBeing in charge or guiding others.The best or most important thing or person.
ExampleShe has a leading role in the new play, showcasing her talent.She is number one in her class.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB1-
Part of speechadjective
Collocationsleading role, leading figure, leading cause, leading expert, leading teamnumber one priority, number one hit, number one team, number one choice, number one spot
Antonymsfollowing, subordinate, inferiorloser, least
Common mistakes'Leading' vs 'lead': Confusing the two forms in context., Using 'leading' as a noun instead of an adjective., Misplacing 'leading' in a sentence, affecting clarity.Confused with 'number 1' vs 'number one'., Used inappropriately as a noun without context., Mistakenly capitalized in informal writing.
Usage notesUse 'leading' when referring to someone or something that is in a position of influence or guidance. In formal contexts, ensure you are discussing clear roles or titles.Used to indicate the top position in rankings or to emphasize importance. Avoid in very formal contexts.

See it in real clips

Leading
Number one

Frequently asked questions: Leading vs Number one

What's the difference between Leading and Number one?

Leading: Being in charge or guiding others. Number one: The best or most important thing or person.

Can you show an example of each?

Leading: She has a leading role in the new play, showcasing her talent. Number one: She is number one in her class.

Can I use Leading and Number one interchangeably?

Not always. Leading and Number one are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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